ul {
    list-style-type: none;
    padding: 0;
  }
  
  .todo-item {
    display: flex;
    align-items: center;
    padding: 10px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
  }
  
  .todo-item.done {
    background-color: #e9ecef;
    text-decoration: line-through;
  }
  
  input[type="checkbox"] {
    margin-right: 10px;
  }
  
  span {
    flex: 1;
  }